Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/32530
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Caffau, E. | en_US |
dc.contributor.author | Bonifacio, P. | en_US |
dc.contributor.author | Spite, M. | en_US |
dc.contributor.author | Spite, F. | en_US |
dc.contributor.author | Monaco, L. | en_US |
dc.contributor.author | Sbordone, L. | en_US |
dc.contributor.author | François, P. | en_US |
dc.contributor.author | Gallagher, A. J. | en_US |
dc.contributor.author | Plez, B. | en_US |
dc.contributor.author | ZAGGIA, Simone | en_US |
dc.contributor.author | Ludwig, H. -G. | en_US |
dc.contributor.author | Cayrel, R. | en_US |
dc.contributor.author | Koch, A. | en_US |
dc.contributor.author | Steffen, M. | en_US |
dc.contributor.author | Salvadori, S. | en_US |
dc.contributor.author | Klessen, R. | en_US |
dc.contributor.author | Glover, S. | en_US |
dc.contributor.author | Christlieb, N. | en_US |
dc.date.accessioned | 2022-07-20T12:29:19Z | - |
dc.date.available | 2022-07-20T12:29:19Z | - |
dc.date.issued | 2016 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32530 | - |
dc.description.abstract | Aims: One of the primary objectives of the TOPoS survey is to search for the most metal-poor stars. Our search has led to the discovery of one of the most iron-poor objects known, SDSS J092912.32+023817.0. This object is a multiple system, in which two components are clearly detected in the spectrum. Methods: We have analysed 16 high-resolution spectra obtained using the UVES spectrograph at the ESO 8.2 m VLT telescope to measure radial velocities and determine the chemical composition of the system. Results: Cross correlation of the spectra with a synthetic template yields a double-peaked cross-correlation function (CCF) for eight spectra, and in one case there is evidence for the presence of a third peak. Chemical analysis of the spectrum obtained by averaging all the spectra for which the CCF showed a single peak found that the iron abundance is [Fe/H] = -4.97. The system is also carbon enhanced with [C/Fe] = +3.91 (A(C) = 7.44). From the permitted oxygen triplet we determined an upper limit for oxygen of [O/Fe] < +3.52 such that C/O > 1.3. We are also able to provide more stringent upper limits on the Sr and Ba abundances ([Sr/Fe] < +0.70, and [Ba/Fe] < +1.46, respectively). Based on observations made with ESO Telescopes at the La Silla Paranal Observatory under programme ID 094.D-0488 and 096.D-0616. | en_US |
dc.language.iso | eng | en_US |
dc.title | TOPoS. III. An ultra iron-poor multiple CEMP system | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201629776 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2016/11/aa29776-16/aa29776-16.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 595 | en_US |
dc.relation.firstpage | L6 | en_US |
dc.relation.lastpage | L11 | en_US |
dc.relation.numberofpages | 6 | en_US |
dc.relation.article | 3 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | GBR | en_US |
dc.contributor.country | FRA | en_US |
dc.contributor.country | DEU | en_US |
dc.contributor.country | ESP | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2016A&A...595L...6C | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.grantfulltext | open | - |
item.cerifentitytype | Publications | - |
item.openairetype | Article | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Padova | - |
crisitem.author.orcid | 0000-0001-6081-379X | - |
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